mirror of
https://src.fedoraproject.org/rpms/grub2.git
synced 2024-11-28 15:46:53 +00:00
81 lines
2.6 KiB
Diff
81 lines
2.6 KiB
Diff
From ee4b14ff422b784baa941c80613c79b8ab5140ea Mon Sep 17 00:00:00 2001
|
|
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
|
|
Date: Sun, 10 Mar 2013 18:27:53 +0100
|
|
Subject: [PATCH 201/364] * grub-core/fs/hfs.c (grub_hfs_read_file):
|
|
Avoid divmod64 since the maximum size is 4G - 1 on hfs
|
|
|
|
---
|
|
ChangeLog | 5 +++++
|
|
grub-core/fs/hfs.c | 15 ++++++++-------
|
|
2 files changed, 13 insertions(+), 7 deletions(-)
|
|
|
|
diff --git a/ChangeLog b/ChangeLog
|
|
index bc51ae9..931ae8e 100644
|
|
--- a/ChangeLog
|
|
+++ b/ChangeLog
|
|
@@ -1,5 +1,10 @@
|
|
2013-03-10 Vladimir Serbinenko <phcoder@gmail.com>
|
|
|
|
+ * grub-core/fs/hfs.c (grub_hfs_read_file): Avoid divmod64 since the
|
|
+ maximum size is 4G - 1 on hfs
|
|
+
|
|
+2013-03-10 Vladimir Serbinenko <phcoder@gmail.com>
|
|
+
|
|
Avoid costly 64-bit division in grub_get_time_ms on most platforms.
|
|
|
|
2013-03-10 Vladimir Serbinenko <phcoder@gmail.com>
|
|
diff --git a/grub-core/fs/hfs.c b/grub-core/fs/hfs.c
|
|
index 73ac7f9..14520c0 100644
|
|
--- a/grub-core/fs/hfs.c
|
|
+++ b/grub-core/fs/hfs.c
|
|
@@ -244,15 +244,16 @@ grub_hfs_block (struct grub_hfs_data *data, grub_hfs_datarecord_t dat,
|
|
static grub_ssize_t
|
|
grub_hfs_read_file (struct grub_hfs_data *data,
|
|
grub_disk_read_hook_t read_hook, void *read_hook_data,
|
|
- grub_off_t pos, grub_size_t len, char *buf)
|
|
+ grub_uint32_t pos, grub_size_t len, char *buf)
|
|
{
|
|
grub_off_t i;
|
|
grub_off_t blockcnt;
|
|
|
|
- blockcnt = grub_divmod64 (((len + pos)
|
|
- + data->blksz - 1), data->blksz, 0);
|
|
+ /* Files are at most 2G/4G - 1 bytes on hfs. Avoid 64-bit division.
|
|
+ Moreover len > 0 as checked in upper layer. */
|
|
+ blockcnt = (len + pos - 1) / data->blksz + 1;
|
|
|
|
- for (i = grub_divmod64 (pos, data->blksz, 0); i < blockcnt; i++)
|
|
+ for (i = pos / data->blksz; i < blockcnt; i++)
|
|
{
|
|
grub_disk_addr_t blknr;
|
|
grub_off_t blockoff;
|
|
@@ -260,7 +261,7 @@ grub_hfs_read_file (struct grub_hfs_data *data,
|
|
|
|
int skipfirst = 0;
|
|
|
|
- grub_divmod64 (pos, data->blksz, &blockoff);
|
|
+ blockoff = pos % data->blksz;
|
|
|
|
blknr = grub_hfs_block (data, data->extents, data->fileid, i, 1);
|
|
if (grub_errno)
|
|
@@ -269,7 +270,7 @@ grub_hfs_read_file (struct grub_hfs_data *data,
|
|
/* Last block. */
|
|
if (i == blockcnt - 1)
|
|
{
|
|
- grub_divmod64 ((len + pos), data->blksz, &blockend);
|
|
+ blockend = (len + pos) % data->blksz;
|
|
|
|
/* The last portion is exactly EXT2_BLOCK_SIZE (data). */
|
|
if (! blockend)
|
|
@@ -277,7 +278,7 @@ grub_hfs_read_file (struct grub_hfs_data *data,
|
|
}
|
|
|
|
/* First block. */
|
|
- if (i == grub_divmod64 (pos, data->blksz, 0))
|
|
+ if (i == pos / data->blksz)
|
|
{
|
|
skipfirst = blockoff;
|
|
blockend -= skipfirst;
|
|
--
|
|
1.8.1.4
|
|
|